Wax-thread sewing-machine.



.v s. LEE a F. AsHwonTH.

WAX THREAD SEWING MACHINE. Armcmon msu rtg. u, m5.

Patented De@ 11,1911.

'l-n rum. uvm-luisanlc.

s. s.l LEE a. F. AsHwonH.

WAX THREAD SEWING MACHINE. APPucATloN' r'lLznlrEa. n. m5..

Puma Dw."11,1917.

unina-fsm 2.

, ,n.ls. LEE n F. AsHwonrH.

WAX THREAD' SEWING MACHINE'.

Armenio men rsa1 Il. um. l

' l Patented Dec. 11,1917.

B. S. LEE F. ASHWORTH. mx THREAD Sewms MACHINE. APPLICATION-FILD11.11.1915.

Patented De.; 11.1917.

ssnEsTs-snzt 4.,

` `.A auf & F. AsHwoaTH. ,f

WAX THREAD SEWING MACHINE.

lMPLICAI'IUN FILED EIUH |9175- Patented 1m 11,1917. 5 NIEUW-'l EU 5 inthe seam. v

`I)ill"erent heatingA mediums are employed UNITED STATES PATENT OFFICE.

BERNARD s. LEE ND FRED AsHwon'rH, or BEVERLY, misswnusm'rrs, AssmNons".'ro UNrrnn snor: MACHINERY COMPANY, or rArEnsoN. NEW Hanser, A couronn-TION 0F NEW JERSEY.

WAX-THREAD' SEWING-MACHINE.

Bpeuioation of Letters Patent.

Patented Dec. 11, 1917.

Application led February 11, 1915. Serial No. '7.463.

To all w om it may concern.'

Be .it mown that we, BEnNAnn S. Lim'and Flinn Asiiwoirrn, citizens ofthe United States, residing at Beverly, in the county of Essex and Stateo f`Massa'chusetts, have invented certain i' new and useful Improvementsin lVaXThread Sewing-Machines; and we do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the .art to which it appertains to make and usethe same.

This invention relates to wax thread sewing machines, and moreparticularly to heating apparatus for such machines.

In wax thread sewing machines the needle thread, as it comes from thesupply, is ordinarily conducted through a receptacle containing-meltedwax, and then is passed about afseries of thread handling devicesbetween the wax receptacle and the work. In order that the 'threadmayreach the -work with thewax which has beenapplied thereto inroper'condition to form a. satisfactory tightseam, such machines areusually provided with devices for heating the parts of the machine tokeep the thread warm from the time that it leaves the wax receptacleuntil it reaches the Work. In lockstitch wax thread sewing machines theWax is usually applied 'to the bobbin thread before the thread.isv'wound upon the hobliin und the, bobbinfull of lwa-Xed-thread isinserted in the rotar `hooker shuttle prioruto the beginning of 4t 1esewing operation. In such machines, heatingdevic'es nre provided forheatingtheshuttle and.- adjacent parts toreduc'e theV wax` oliftlie.bobbin thread to the proper consistency andto keep the bobbinl 'thread-warm `so that it will reach'the work in proper condition to beincorporated for heating 'the part-s of waxthread sewing machines, andeach-particular heating inedium 'requires 'especially constructeddevices for-'applyin' tie heating medium to the machine.l eretoforeithas .been the practice' to conetructli irent .machines for .each

"- lieaflinginediutinirlrieh infin-ight. be desirable 4to iisegfeielr:iniiclnreislgring -:es peially designed for the particularheating mediumto be employed to heat the saine.

The primary object of the present invention is to produce u wax threadsewing machine having a construct ion suchv that di ti'erent heatingmediums can be alterna( i rely employed on the saine machine. forheating the various-parts of the machine. ln accord'- ance with thisobject the invention conteniplates the provision in '.1 sewing machineof this class of `a series of interchangeable heating members especiallyconstructed for the use of different heating mediums, and adapted to titalternatively at the same point on the machine, which is complemental toeach heating member of the series.

Another object of the invention is to provide wax thread. sewingmachines with an improved heating device for the thread waxingreceptacle, by which the wax ma)y be heated in a reliable manner, nmlmaintained .at the proper temperature, with :i minimum expenditure ofheat. In accordance with this object another -feature of the inventioncontemplates the pro\'ision\ of` a heating member fo'r the waxreceptacle arranged lo extend into the receptacle und provided with nseriesl of lient radiating. blades or plates for heating the wax alongrthe pnlh of travel ot the thread through the receptacle. This member ispreferablyv constructed substantially U-.shnped und euch nrm ot' thesame is formed with rndinllv projecting heat rndiating plates. Thethi-end is conducted through the receptacle in a path adjacentrens-istof certain constructions, arrange ments and combinations of partshereinafter described and pointed out in the claims, the advantages ofwhich will hr obviinis to those skilled in the art from the followingdescription.

In the accompanying dra wings, illustrating a sewing machine embodyingthe various features of the invention lin their preferred forms, Figure1 is a view in side elevation of a portion of an outsole lock -1 stitchshoe sewing machine showing the machine equipped with devices forheat-infr the parts of the machine by electricity; Fig. 2 is a viewsimilar to Fig. 1, showing the machine equipped with devices for heatingthe parts of the machine by steam; Fig. 3 is a plan view,partly insection, of a heating member for the Wax receptacle and associated partsforming a art of the electrical heating equipment o the machine, asshown in Fig. 1; Fig. 4 is a view in side elevation, partly in section,andl Fig. 5 is a view in front elevation, partly in section, of theparts illustrated in Fig. 3; Fig. 6 is a plan view of a heating memberfor the wax receptacle and associated parts forming part of the steamheatingequipment of the machine, as shown in Fig. Q; Fig. 7 is a view inside elevation, and Fig. Sus a view in irontelevatlon, of

the parts .illustrated in Fig. 6; Fig. 9 is a;

view in front elevation of a steam heating device for the shuttlebracket employed when the machine is equipped as shown in Fig. 2; Fig.10 is a view in front elevation, and Fig. 11 is a view in sideelevation, of a bracket supporting lcertain of the thread handlingdevices betweeri'i'the wax receptacle `and .the work, employed when themachine is equipped with electrical heating devices as shown in Fig. 1;Fig. 12 is a view in side elevation of the bracket illustrated in Figs.l0 and ll, taken from the opposite side of the bracket and showing thethread handling devices associated therewith; Fig. v13- is a view infront elevation, and Fig. 14 is a view in side elevation, of a bracketsimilar to that illustrated in Figs. 10, 11 and 12, which -is employedwhen the machine is equipped with steam heating devices as shown -inFig. 2; and Fig. 15 is a detail view in side elevation illustratingparticularly a portion of the frame of the machine formed toreceiveinterchangeable heating brackets,- ihc'outline of one of'thesebrackets being shown in ldotted lines. y

The sewing machine illustrated `in the drawings is a wax threadlock-stitch shoe sewing machine for sewing outsoles tothe welts ofwelted' shoes, having substantially-.

the same general construction, arrangement and mode of operation as the;machineillus: trated and described in the patent granted to FredAshworth, one of the presentappli,

cants, No. 1,169,909,dated February l, 1916.-

The machine comprises an oscillating curved hook needle4(), a 'curvedawl=44, a looper 3G, a rotary hook or loop-taker 3S and certaini otherthread-handlingdevices hereinafter referred to. The course of theneedle` thread 20 as it passes from the supply tothe sewing' point isclearly shown in Figs. 1 and 2. The dry thread as it comes from thesupply is cially constructed for the use' of electri t'y 12o conductedthrough the wax receptacle- 22 and as it emerges from the receptacle,passs through a strippin device 24, and then about a thread truc 12 fromwhich it extends'forwardly through an opening or bore 70 16 in themachmeframe to the front of the machine. The thread as it emerges fromthe bore 16, is wound about a tension wheel 26, and from the tensionwheel passes through the eyes of a ull-olf 28, about the 75 thread truck31 of the t read locking device, over the thread truck 32 of theauxiliary take-up, then extendsdownwardly about the thread truck 34 ofthe main take-up andi from the main take-up upwardly through ajo the/eyeof theloperjB- tothe work resting` upon the work support V42, Theconstru`- tion, arrangement: and mode of operation of the parts of'thel'nachine thus far are substantially 'the same as the nd: g5

ing parts of the machine illustrated 1n the above Ashworthblapplication.In the pres ent a plication the machine has been illus; trate with agreater partof the mechanism removed in order to give a clearer under-'90 standing of the invention.

, Wax thread sewing machines of the type illustrated in the drawings areusually hea* ed by constructing and arranging the hear( ing devices toapply the heating medium t9 .5 the machine to heat the mach-lne at threeprincipal points. The shuttle. and associ# ated parts of the machineadjacent the poing `of operation are heated by ap lying 'hea to thebracket or ortion of the rameof the machine above t e shuttle. v To ,thethread Warm as it passes fromv the vv in ceptacle over the variousthread devices tothe work, the pxortion of the -fratrie in proximity tothese t vices is heated, the heat transmtted'ltliereby beingsufiicientto keep these devices'and the adjacent parts of the machine.warm. The wax in the Wax receptacle is maintained ini a properly meltedcondition nalong the'path' ,1110,l

of the thread and the thread is'kept Warml as' it passes from the wax.receptacle -by means of a bracket extending dwninto the Wax recetacle', to which 'hea.t is applied-to kee' the bracket hot.-

l 115 he .machine illustrated is' providedwithv I.two sets ofinterchangeable heatingvdevices 4 constructed and arranged tobe' fitteda1ter` as a heating medium,pand the other for the 4 useof steam. Eachsetof heating devices comprises a heati'n device vfor heating the shuttle,and the adlaoent parts of the machine, a heating device forheatingthe-parts of the machinebetweenthe waxl receptacle' and the work,` anda. heating device for heatinlg the wax-receptacle and associated parts.T e corresponding heating'devices of the twosets aregadapted to beapplied to the 130 frame .of the machine interchangeably at the samepoint on the frame und to this cudI are given substantially thc sameshape or contour at the portion thereof which is to be fitted to theframe of the machine, the

partof the frame to which the correspondmg heating devices are to bealternatively applied bemg complemental to the corre` spending devices.With this construction either o the corresponding heating devices of thetwo sets may be readily fitted to the frame of the machine and securedin posi i tion thereon. l

To enable the bracltet'46 above the shuttle to be heated .this bracketis bored at 68 for the rece )tion of a heating device. When the mac nineis tofbe equipped with electr-ical heating devices es shown in Fig. l,an electrical resistance' unit or cartridge 70 constructedto iit nicelyin the bore 68 1n the bracket is inserted in this bore. This unitconsists of a series of heating coils embedded in insulating materialand 1s provided with terminal wires 71 adaptedA to be connected in anysuitable manner with the main cire cuit terminals. ,When the machine isto be equipped with devices for heating the machine by steam as shown inFig. 2, a steam chamber 72 shown in Fig. 9, having substantially thesume crosssection asthe electrical unit 70, is inserted in thc/bore 68in the bracket ltn'ns shown in Fig. 2 and is'supplied with steam throughsuitable connections with the steam supply system. Both 7:2 are arrangedto fit closely in the bore 68 in thebracket Y-lG so that n good contactis formed between the heating device and the bracket to `transmit theheat from said dcy'ice 4B to the,: -,brackct. Bypthe hea-t given oii'-by thc heating device applied to this bracket thc shuttle is heated soas to reduce the wax on the bobbin thread to thepropcr condit-ionbcforeit leaves thc shuttle, and the de- `vices associa-ted with .the shuttleand the parts' adjacent the-point of operation -are kopt hot so as toprevent the chilling 'fofthe shuttlelhrcad before it reaches the work,und also to `keep the ncedlcthread warm'.

fin order. to heat the parts of the machine, and particularly (he threadhandling devices, between tluwax pot and-the work, interchangeableheating brackets, one' c011- `structcd l'orhthcuse of clectricityand'theother for. the' usc of steam, are vprovided which are adapted to `,befitted to the machine at a point in proximity to these thread hand Vhcnthe machine is .to be t i U interchangeable brackets shownrcspectivelyfflc `ling devices.

heated by electricity the bracketiiS shown in Figs. 10,:11 and 12 isapplied to the machine as shown in Fig. 1 to enable the parts vofthemachine between the wax potfand `the work to-'bc kept in-aheated-condition. This bracket is formed with a bore 74 to re- 'ceve anelectrical resistance unit o r carthe electrical unit and the steamchamber `0n each bracket whiclrare arranged tridge similar to theelectrical iinit 70 ,and havlngterminal wires 7,7 forconnection `withthe main circuit. When the ,ma-

chine .is tobe lheated by steam the bracket" 49 shown in Figs. 13 and 1iis appliedtothe 70 machine asshown'in -Fig. 2 in place'o'fthe bracketillustrated in Figs. 10, llvand 12. This bracket istprovided with astenmchaim, Y. ber arranged for connection with the steam pipes of thesteam heating systein. 75 The bracket shown in Figs. l0, 1 1 and lz andthe bracket shown in` Figs. 13 4and '171 have substantially the sainecontour' yat their u rear portions where they are fitted to'44 i' frameof the'machine` so that Ithey n adapted t0 fit interchangeably into [licsome complementa] recess' 91-in the t `c of the machine, as shown inFig. l5. lilly ofv these brackets is'l provided with a bvarin'g""' 06for the shaft 93 of the tension` wlncl. 85 with a threaded bearing 94 toreceive the stud 30 upon which the thrcndt'ruck ilof the thread lockingdevice is mounted, with u nlbenring 92 to receive the shaft 95 of theauxiliary tnke-up arm, and with a 'healingr 90 for. the reception of the,shaft Sli' ,of 'thc main take-up arm, these 'bcaringsf haringsubstantially the same relationsV in 'cach oi' the two brackets. Thebearing 12 for Athi shaft ofthe auxiliar?,7 `take-up"arm and the bearing90 for the s aft of the vmain 'tahoup arm are arranged upon both thebrat-kris iS and 49s() that when either ot' these brackets is fittedinto the recessillin the frame, these' bearings Willrcgistcr with thc100 bearings 82 and 98 on thel frame'forthcsc shafts. Each of thebrackets isprovidcd with a bearing 84 to receive' a securing screw S5,adapted to be passed through this beni-J'v ing and screwed into a.complemcntal thrcatled bearing 87 inthe frame of themachnc. and with athreaded bearing 86 to rcccirc a vsecuring screw V89 .ada`p'ted to 'bepassed through a complemental 'bearingiltl in tihc f ramcof thc machineand threadcdintd theA bearing SG in the bracket lto "secure 'Vt-'hcbrackets alternati vel y1 to the francer the l i`ci"` ings in the frameforthesecringsci' being arranged to register with thcfbV ings for thescrews in each of ythe lbi'nck'" The brackets 'are both. formed with firments 88 and Silhaving"v the 'same lloc' gage the abutments 8O h nd 83`th'eff'fr' n to' locate each bracket in the "ioper' p tion'when it is`applied to the yfraine.` ,In order to enable thef Whxfigcceptftlcletobe heatedcither byelectricity or`stearn"tlie l the' same as those'employed to 1heat the bracket 46 adjacent the shuttle and the bracket 48between the wax receptacle and theworln When the machine is to be heated'by steam, the bracket 51 shown in Figs. 6,-

7 and 48 is fitted to the machine as shown in Fig. 2. This bracket isprovided vvithy a steam heating pipi or chamber, arranged to be suppliedWit steam throughl suitable connections with the steam heating'system.The bracket shown in Figs. 3, 4`` and 5 and the bracketshown in Figs.'6,v 7-'and 8 are each yconstructed with an upwardly extending plate102,thev forward face'of which is 'formed to fit' against an abutment 104 onthe ranie 'of the machine, thesep'lates being bored to form bearin s-105 to receive selcuring screws 113. 4T e frame of the machine isprovided with' threaded bearings- 107 Which are arranged to registerWith4 the bearings 105 in'the plate 102 on each ofthe brackets so thatthe brackets maybe alternatively secured to the frame at the saine pointb the securing screws.

The bracket shown in Fi s.'3, 4 and 5, which is employed when tiemachine is fitted to be heated by electricity, comprises a cover 100 forthe ivax' receptacle and a- U- shaped-heating device 106, the arms 108 of .which extend through the cover 100 vand are .secured thereto. Thearms of this U-'sh'aped heating device are each formed with acylindrical chamber 117, as shown in Fig.- ,5, to receive electricalresistance units 118 having terminal Wires, 119 for connection with themain' circuit terminals. To increase the heat radiating areaof theheating device each of the -arms of said device are formed with radiallyprojecting 'heat radiating platesor blades 1 4? shown particularly inFigs-4 and 5. This heating device is arranged to extend down into theWax in the -Wax receptacle and to keep the wax along the path of thethread i'n-'a suitably meltedl condition. The thread as it comes fromthe supply passes down linto-the receptacle in a path adjacent oneofthearms of the heating device '106, about the thread vtruck 116 mounted onthe lower portion. of the heating device which connects the armsthereof-and then` extends upwardly adjacentv the other arm of theheating device through' the 'stripping device 24 and over thethreadtruck 12 mounted on the cover from 'which it asses forwardl#through the bore .16 inthe rame. With this construction of theheating', device and with .jthis', arrangement of the devices forguiding 4.the thread, the Wax'y in the Wax receptacle I along .tlievpathof the thread is y kept in a thoroughly melted c ondition'fwith a mini-3- mum expenditure Vof heat. Toenable the Vthread to be vkept Warm afterit leaves the istrip er 24.until-it 'reaches the' bore 16 in the., ame,the coverof the Wax receptacle is provided with an lupward-ly extendiarm 122 secured thereto fby screws 124 in which is formed a' cylindricalchamber 123 toireceive an electrical resistance unit 'or cartridge 132havin terminal wires 133 forl connection Awith t e main circuit. The arm122 is conopenings 156' in the cover and sccuredto the cover by means ofa clamping plate 160 lield in place by the screivlG. This heatingdevice. consi-sts 'of a' U-shaped tube arranged to extend down iiito'thewax in the wax receptacle and to be connected at one end with an inletpipe and at the other end with an outletpipo of the steam heatingsystem. The thread as Vit comcs from the supply passes through anopening 168 in the cover of the ivax receptacle down into thereceptacle, .about a thread truck 164 mounted on a support 166,'spanning'the arms of the-U- tube 154, then extends -upxvardly through thestripping device 2i and over thc 'thread truck 12, mounted on the arm17.0 secured to the cover. The path of the thread through the receptacleis Substantially parallelv with andmljacent tothe U-tube 154 and the waxin the receptacle along the. path of the thread is maintained in uproperly melted condition by the heat transmitted by the U- tube.Suilicicnt heat is given off from the U-tube to keep the strippingdevice 2.4, the thread truck 12 and the other parts of the machineadjacent the path of the thread as the thread passes from the waxreceptacle to the bore 16 in the frameA of theniachine in a heatedcondition so as to prevent the chilling of thel thread before it entersthe bore 16.

` lVhen thc machine is equipped ivitlrclcctricallicating ldevices thcelectrical connec. tions are Ipreferably arranged'as shown-.11i Fig. 1.-ln' the Construction illustrated iu catedatf and are connected throughthe "fuse-bok 58 .with thc main cut-out switch indicated at 60. The'main currentI circuit is connected by the switch (50l with the tcl'-ythis figure 'the main curi-ent .wires are indi minals/in the junctionbox G2 where thc curbox where they are connected with the main circuitterminals, through the tube 79 and are connected with the terminal Wires71 of the resistance unit in the junction block 81 secured to thebracket 46. The main circuit terminals are connected with the heatingunit 76 applied'to the bracket 48 for heating the tension device,take-up and associa'ted parts between the wax receptacle and the work bymeans of the secondary circuit wires or conductors. 142 passin from thejunction box through one of the insulating cables 64 and connected withthe terminal Wires 77 of the unit 76 Within the junction block 78secured to the bracket 48. The current is conducted from the main cir*cuit terminals'in the junction box to each of the heating units 118inserted in the arms of the heating device 106 by means of the secondarycircuit wires or conductors 120 passing from the junction box 62 throughone of the insulating cables 64 and connected with the terminal wires119 of the resistance unit in the junction block 158.

It is desirable that. the wax in the wax receptacle -should be able tobe heated up quicklyr when the machine has been idle for some time andthe wax in the receptacle has become hardened throughout. In thepractical operation of wax thread sewing machines a great dea-l oftrouble is caused by the wax in the receptacle becoming over- .heatedand boiling over. Inbrderto enable the heat generated in the resistanceunits 118 to be easily and conveniently controlled a rheostat 66 isconnected in series in the circuits of which` theSeunts form a part tocontrol the current thgrough each of these units. The provision.t oftherheostat for controlling the heat generated in the units 118 in theheating device 106 for heating the wax receptacle enables the. wax to beheated up and melted quickly when desired and the heat transmitted bythe heating de- .vice to be conveniently controlled so as to keep thewax in the rece tacle in just the right condition to be app ied te .thethread and to prevent the boiling over of the wax.v

The current passes from the main circuit terminals to the resistanceunit 132 mounted l in the arm 122 on -the'cover of the wax .receptaclethrough the secondary circuit wires or conductors 134 leading from thejunction box throughi'one of the insulating cables 64 and vconnectedwith the terminals 133 of said unit in a junction'block 136.

-f 'The various heating devices with which the machine@ is fitted whenequipped for heating the parts'thereof by steam are preferabl connectedby a system of ipes such as il ustrated in Fig. 2. In t e system shownin this figure the steam chamber 72 is supplied with steamthrough aninlet pipe 138 connected with one end of the chamber by a union 140. Theother endl of this chamber is connected by a union 143 with an outletpipe section 144 which extends from the front of the machine rearwardlyand downwardlyl tothe backof the machine and is connected by a union 145with the rear end of a horizontal pipe section 146. The pipe section146- passes forwardly throu h a sultable bore in the frame of the macine and has its forward end tap ed into the steam chamber in the brac et49 so that the steam chamber is supplied with steam through this pipesection. The pipe section 146 is located close to the bore 16 in theframe through which the thread passes and the' heat transmitted therebyis suicient to heat the part of the frame adjacent this bore so that.the thread is kept warm as it passes through the bore. The steam passesfrom the steam chamber 75 in the bracket 48 through an outlet pipesection 151 connected with the chamber by a union 150. The outlet pi j esection 151 is connected by a horizonta pipe section 152 with the pipesection 153 which in turn is connected with one of the arms of theU-tube 154 and su plies steam thereto. The other arm of t e U tube 154is fitted with an exhaust pipe 155 through which the exhaust steampasses of the series, and means for securing said members alternativelyin position.

2. A wax thread sewingm'achine, having vin combination, stitch formingdevices, a

frame for supporting the operative parts of the machine, a series ofinterchangeable heating brackets constructed to employ different heatingmediums and formed to lit alternatively at substantially the same pointon the framel which is com lemental to all of said brackets and means orsecuring said. brackets alternatively in position.

3. A wax thread sewing machine, having in combination, stitch4 formindevices, a series of interchan eable heating members constructedto empoy dierent heating mediums and formed to t alternatively atsubstantially lthe same point on the machine which is complemental toall the members of the series, each'` member of the series. hav-` ingmeans 'by whiehuitsmay be-aecured-in position and securing meanscomplemental steam as heating mediu alternatively at substantia y thesame point` to and arranged to register with the securling lmeans of allof the members of the series.

4. -A wax thread sewing" machine, having 1n combination, stitch formingdevices, in-

terchangeable heating members .constructed respectively for the use ofvelectricity and formed to lit on the machine which is, compleinental toboth heating members, and means forl securing said'heating membersalternatively in position.v

5. A wax thread sewing machine, having win combination, y stitch formingdevices, a frame.. fforsupporting the operative parts oftheniachine, alseriesofheating brackets constructed to 4employ.different heating me-:diumsand forme'dlt'c fit alternatively ,at substantially the sainepoint on the frame which is' complemental to all the heating members,and bearings on saidbrack'ets for certain of the operating parts of themachine located in' the .sames relation on all of th bearin -brackets ofthe series..

4 6. A wax thread sewing machine, having. 1n combination, stitch formingdevices, av

framel for supporting the operative parts of the Inacliine,.a series ofheating brackets constructed for the, use of different heating mediumsand formed to fit alternatively at substantially the saine point on the'frame; on said brackets for certain of the operating arts of the machine.having ythe same relation upon al1 of the brackets of the series, eachof the brackets having means by which it may be secured to the frame and-securing means on the frame complemental to and arranged to registerwith the securing means on alllof the brackets of the sries. l

7. Av wax thread sewing machine, having l in combination, awaxreceptacle, a heating device arranged to extend into the receptacle andhaving a seriesof heat radiating `plat-'es extending outwardly from thebody thereof, thread guiding means for guiding the thread through thereceptacle and means for heating said device.

8. A`wax thread sewing machine, having in combination, a waxreceptacle,a U-shaped heating member arranged to extend into the receptacle forheating then-ax in the receptacle, a series of radiating platesextending fromeach .of the arms of said heating member andthread guidingmeans for -holding the thread in the heat radiating larea of theradiating plates.

. 9. A fwaxt-hre'ad sewing machine, having incombination, a4 waxreceptacle, a Vcover for'the receptacle, a heating device attachedtzr-the ycover and arranged to extend into the receptacle, threadguiding means for guidingl the thread through the receptacle, threadengaging devices engaging the thread after 1t leaves the receptacle andan auxiliary heating device' mounted on the cover for heating saidthread 'engaging devices.

10. Av wax thread sewing machine, having in combination, a Waxreceptacle, a U-shaped heating device larranged to extend into thereceptacle havin ya cylindrical chamber in each arm thereo an electricalheating unit mounted in each of said chambers, a series of heatradiating plates extending outwardly from each arm .of the heatingdeviceand thread guiding means for guidingthe thread through the reeeptacle.`i

11. A wax thread sewingimaehine, having in combination, a waxreceptacle, a heating 'device arranged to extend into the' waxreceptacle so as to b e partially immersed in the wax, an electricalheating unit-mounted in said heating device, circuit connectionstherefor, means connected in the circuit for said unit to control theheat generated therebyand thread guiding means for guiding the threadthrough the receptacle.

12. A wax thread sewing machine, having in combination, stitch formingdevices, interchangeable heating brackets constructed respectively forthe use of electricity and steam as heating mediums formed to fit atsubstantially the same point on the machine which is complementa] toboth of said brackets, bearings on saidl brackets for certain of theoperating parts of the machine located in substantially the samerelation upon both of the brackets, and means for securing said bracketsalternatively in position.

13.. A wax thread sewing machine, having in conibinatioi'i, stitch'forming devices, a l

wax receptacle, a series 0f electrical l'ieating units for heat-ing theparts ofthe machine to keep the thread warm between the wax receptacleand the work, an electrical heating unit for the wax receptacle, maincir- .cuit terminals, conductors for connecting the heating units withthe main circuit terminals in parallel, and a rheostat arranged tocontrol the heat generated in the wax receptacle heating unit withoutaffecting the heat f generated in the other heating units.

14. A wax thread sewing machine, having in combination. a waxreceptacle, a cover for the receptacle, a heating device arranged toextend into the receptacle for heating the wax in the receptacle and aheating device mounted on the cover for keeping the parts of tliemachine warm. along the path of the thread after it leaves thereceptacle.

15. -A wax thread sewing machine, having, in combination, a waxreceptacle, a U-shape'd heating device arranged to extend into thereceptacle 'and having a chamber in eacharni thereof, an electricalheating unitmounted'in each of' said chambers, circuit connections forthe heating units, and thread l idin devices for guiding vthe thread troug the receptacle.

16.v A Wax thread `sewing machine, having,

in combination, a wax receptacle, a heating device arranged tovextendinto therecepta'cle seas tobe partially immersed in the Wax and having achamber therein, an electrical heating unit mounted in 'saidchamber,circuit connections for the heating unit, andthrea'd guidingdevices for guiding the thready through the receptacle.

17. A Wax thread sewing machine, having, in combination, a waxreceptacle, a heating device arranged to extendfinto the receptacle, anelectrical heating yunit mounted 1n said heating device, thread guidingdevices forv guiding the thread through the receptacle, a thread guideengaged by the thread after it leaves the receptacle, an electricalheating unit for heatin said thread guide, 20

andcircuit connections or the heatin units. 18. A wax thread sewmgmachine, aving, 1n combination, a Waxreeeptacle, a cover for thereceptacle, an electrical heating device for heating the Wax in thereceptacle, thread 25 guiding devices for guiding the thread through thereceptacle, and' an auxiliary electrical heating d evice mounted on .thecover forkeeping of the parts of the machine warm along the path of thethread 30 after it leaves the receptacle.

BERNARD S. LEE.` l FRED ASHWORTH. Witnesses:

ABBIE'L. FREAR, CHESTER E. ROGERS.

